Energy Efficiency in Nepal's Cement Sector

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Based on a GIZ study in 200 Nepalese industry findings on the energy efficiency potentials and energy saving measures for cement sector in Nepal is presented.

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Energy Efficiency in Nepal's Cement Sector

  1. 1. Cement SectorEnergy Intensity 45% of manufacturing cost
  2. 2. Cement Manufacturing – technologies• Limestone is the raw material used in the manufacture of cement. The thermal energy consumption average is about 760 kcal/kg of clinker. Based on the study of the latest cement plants, the target energy consumption for a new cement plant could beast below: Specific Electrical Energy consumption : 75 units/ton of OPC – 43 Specific Thermal Energy Consumption : 715 kCal/kg of clinker
  3. 3. Area of savingMines and Crusher Raw mill grinding &Short-term storage• Increase operating capacity • Install variable louvre system for of primary & secondary roller mill crusher • Install high efficiency dynamic• Reduce idle run of crushers separator for roller mills and belts • Install belt and bucket elevator• Reduce idle operation of in place of pneumatic conveying dust collection equipment • Installation of efficient millLong-term intervals – diaphragm and liners • Install slip power recovery• Install bulk analyzer for system / VFD for raw mill fan / crushed limestone ESP fan
  4. 4. Area of savingCompressors & Electrical System Compressed Air • Use energy efficient lighting System • Distribute load on transformer• Install screw compressors network in an optimum manner with VFD in place of old • Improve power factor compressors. – Individual compensation• Install compressed air traps – Group compensation for receivers – Centralized compensation• Optimise compressor • Replace over sized motors discharge pressure • Replace with energy efficient• Eliminate compressor air motors leakages by a vigorous maintenance programme • Use VFD for low / partial loads• Maintain compressed air filters in good condition

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